Slider for fastener

ABSTRACT

[Object] To provide a slider for fastener fittable to a fastener after a sealed packaging bag including the fastener is broken and opened, and also easy to fit to as well as remove from a fastener of another bag. 
     [Solution] The slider includes a first slider member  2  provided with a projection  2 A for disengaging a male engageable member from a female engageable member both included in a fastener F and a second slider member  3  provided with a narrowed portion  3 C for engaging the male and female engageable members to each other. The projection  2 A of the first slider member  2  is adapted to be inserted forcibly from outside between the male and female engageable members in an engaged state, and the narrowed portion  3 C in the second slider member  3  is adapted to fit the male and female engageable members in a disengaged state with each other and hold them. Two protrusions  2 E each provided with a boss  2 I are provided on the first slider member  2  in a manner extending toward the second engageable member  3 . A hole  3 F is provided in the second slider member  3 , into which the protrusions  2 E are fitted in a manner extending out of the hole  3 F. Bosses  3 L are provided in the hole  3 F, by which the bosses  2 I on the protrusions  2 E are caught.

TECHNICAL FIELD

The present invention relates to a slider for fastener applicable toexisting packaging bags with a fastener and even, in particular, topackaging bags with a fastener in which the upper end portion on theouter side of the fastener is sealed. Such a slider may be fitted to afastener portion after the vicinity of the fastener is broken. Such aslider may be formed as a separable slider, these are fitted to eachother and assembled as a slider which is adapted to open and close thefastener.

BACKGROUND ART

Many conventional packaging bags made of synthetic resin film include afastener (referred to also as zipper). Such a fastener in packaging bagsis provided as means to prevent the ingress of dust and/or water as wellas to prevent articles placed in a packaging bag from being lost. As formost of conventional packaging bags with a fastener, the fastener isopened and closed by hand, or a slider for opening and closing thefastener is attached to the bags. That is, in the case of using aslider, a fastener F is provided at a mouth E of a packaging bag W andan opening/closing slider 10 is fitted to the fastener F, as shown inFIG. 30. Sliding the slider 10 fitted to the fastener F in the directionindicated by the arrow R causes the fastener F to be opened, whilesliding in the direction indicated by the arrow S causes the fastener Fto be closed.

As shown in FIG. 28 (A), such a fastener F typically includes a maleengageable member F1 having a projected streak portion F3 and a femaleengageable member F2 having a recessed engagement groove F4 into whichthe projected streak portion F3 is fitted engageably and disengageably,the members being provided in an adhesive manner, respectively, on oneinner surface W1 and the other inner surface W2 at a mouth E of a bag.When the fastener F of the packaging bag W is initially closed, theprojected streak portion F3 of the male engageable member F1 is fittedin the engagement groove F4 of the female engageable member F2. Themouth E of the packaging bag W can be opened by inserting the projection10A of the slider 10 forcibly between the projected streak portion F3and the engagement groove F4 of the fastener F, as shown in FIG. 28 (B),and sliding (moving) the slider 10. The mouth E of the packaging bag Wcan be closed by sliding (moving) the slider 10 with the narrowedportion 10C of the slider 10 being placed around the male engageablemember F1 and the female engageable member F2, as shown in FIG. 28 (C),so that the narrowed portion 10C presses the mouth E of the packagingbag W on either side thereof.

FIG. 29 (A) is a perspective view of the conventional slider 10, andFIG. 29 (B) is a perspective view of the slider cut from center. Inthese figures, for descriptive convenience, the slider is turned upsidedown (the projection 10A and the narrowed portion 10C are directedupward) contrary to its normal use condition. As shown in these figures,the conventional slider 10 includes the projection 10A provided in astanding manner within an inner space 10E having a wide central portionnearer one side along its centerline, sidewalls 10D, 10D provided in astanding manner on both sides of a bottom portion 10B, and wall portions10F, 10F constituting the narrowed portion 10C having a narrow spacenearer the other side. The slider 10 may be fitted to the fastener Fprovided at the mouth E of the packaging bag W later. As describedabove, the slider 10 is fitted by this arrangement such that theprojection 10A of the slider 10 is inserted forcibly from above, and thenarrowed portion 10C holds the mouth E of the packaging bag W from bothoutsides. In this state, sliding the slider 10 in the directionindicated 3 y the arrow R (see FIG. 30) allows the mouth E of thefastener F to be opened, while sliding in the direction indicated by thearrow S allows the mouth E of the fastener F to be closed.

Sliders as shown in FIG. 30 are most useful, but a little more complexdie is necessarily required for manufacturing of such sliders. Hence,the present applicant has proposed such an engagement-type slider forfastener as shown in FIGS. 26 and 27. That is, the slider for fasteneris a slider 31 which includes a slider member 32 formed with aprojection 32A for disengaging a male engageable member F3 from a femaleengageable member F2 both included in a fastener F, the male engageablemember F1 having a projected streak portion F3 and the female engageablemember F2 having an engagement groove into which the projected streakportion F3 is fitted engageably and disengageably, the members beingprovided, respectively, on one inner surface and the other inner surfaceat a mouth of a bag, and the other slider member 33 formed with anarrowed portion 33C for fitting the male engageable member F1 into thefemale engageable member F2. And the slider 31 for fastener has astructure in which the separately-formed slider members 32 and 33 arefitted to each other (refer to Patent Literature 1).

In addition, sidewalls 32C are formed on both sides of the slider member33 having the projection 32A, while columnar portions 22A are formed oneither side of the narrowed portion 33C in the slider member 32, andrecessed portions 33E are formed on the outer side of the respectivecolumnar portions 33A, whereby the sidewalls 32C can be fitted to therespective recessed portions 33E (refer to Patent Literature 1).

-   Patent Literature 1: Japanese Patent Application No. 2008-148231

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention

The slider 10 shown in FIG. 30 can close the fastener F provided at themouth of the packaging bag W. There are, however, packaging bags, suchas shown in FIG. 25, including a fastener F and a sealed end portion onthe outer side of the fastener. Such packaging bags W provided with thefastener F are for closing, after opening the bag, to prevent theingress of dust and/or water from the outside as well as to preventarticles placed in the packaging bag W from being spilt. However, suchpackaging bags W including a closing fastener cannot employ a slider 10.Once such a bag is opened by, for example, breaking the vicinity of thefastener F by hand or cutting with scissors, the bag can only be closedby, for example, pressing the fastener F by hand or opened by, forexample, inserting a hand (finger) through the broken mouth. Inaddition, separable sliders 31 as shown in FIG. 26 are less easy todisassemble after once assembled and fitted to the fastener F, whichmakes their removal and reuse cumbersome and complicated. There isanother problem in that the slider member 22, when reaching one end ofthe fastener F of the packaging bag W, travels accordingly outside thefastener to easily fall off. There is a further problem in that when oneslider member 32 and the other slider member 33 are removed, one of themis easily lost because of the separable type.

The present invention has been made to solve the above-describedproblems, and an object thereof is to provide a slider for fastenerfittable to a fastener included in a sealed packaging bag W after thebag is broken and opened, having a relatively simple structure to bealso fittable from one end of the fastener, and easy to remove evenafter once fitted to the fastener of the bag. It is another object ofthe present invention to provide a slider for fastener easy to removefrom the fastener and to fit to as well as remove from a fastener ofanother bag, adapted to stop, even when reaching one end of thepackaging bag W, not to be disengaged from the fastener F of thepackaging bag W, and not completely separable, even when the slidermembers may be separated, so that neither one of the slider members canbe lost.

Means for Solving the Problems

In order to achieve the foregoing objects, a first aspect of the presentinvention is directed to a slider for fastener including: a first slidermember (2, 22) formed with a projection (2A) for disengaging a maleengageable member from a female engageable member in an engaged state ina packaging bag, the engageable members together forming a fastener (F)which is an opening of the packaging bag, the male engageable memberformed by a projected streak portion on one inner side of an end portionof the packaging bag, the female engageable member formed by anengagement groove on the other inner surface of the end portion opposedto the one inner surface, and the projected streak portion fittedengageably and disengageably into the engagement groove; and a secondslider member (3, 23) formed with a narrowed portion (3C, 23C) forengaging the male and female engageable members with each other, theslider for fastener being formed by fitting the first slider member (2,22) and second slider member (3, 23) to each other, in which the firstslider member (2, 22) is formed with the projection (2A, 22A), which isadapted to be inserted forcibly between the male and female engageablemembers in an engaged state in the fastener (F) from outside thefastener (F) of the packaging bag, and two protrusions (2E, 22E)extending toward the second engageable member (3, 23), and in which thesecond slider member (3, 23) is provided with the narrowed portion (3C,23C), which is adapted to fit the male and female engageable members ina disengaged state with each other and hold them, and a hole (3F, 23F)into which the two protrusions (2E, 22E) are fitted, the slider forfastener having a structure in which the two protrusions (2E, 22E) onthe first slider member (2, 22) extend out of the hole (3F, 23F) in thesecond slider member (3, 23) when the first slider member (2, 22) andsecond slider member (3, 23) are fitted to each other.

A second aspect of the present invention is directed to a slider forfastener including: a first slider member (2, 22) formed with aprojection (2A, 22A) for disengaging a male engageable member from afemale engageable member in an engaged state in a packaging bag, theengageable members together forming a fastener (F) which is an openingof the packaging bag, the male engageable member formed by a projectedstreak portion on one inner side of an end portion of the packaging bag,the female engageable member formed by an engagement groove on the otherinner surface of the end portion opposed to the one inner surface, andthe projected streak portion fitted engageably and disengageably intothe engagement groove; and a second slider member (3, 23) formed with anarrowed portion (3C, 23C) for engaging the male and female engageablemembers with each other, the slider for fastener being formed by fittingthe first slider member (2, 22) and second slider member (3, 23) to eachother, in which the first slider member (2, 22) is formed with theprojection (2A, 22A), which is adapted to be inserted forcibly betweenthe male and female engageable members in an engaged state in thefastener (F) from outside the fastener (F) of the packaging bag, and twoprotrusions (2E, 22E) extending toward the second engageable member (3,23) and each having a boss (2I, 22I) at a leading end thereof, and inwhich the second slider member (3, 23) is provided with the narrowedportion (3C, 23C), which is adapted to fit the male and femaleengageable members in a disengaged state with each other and hold them,and a hole (3F, 23F) into which the two protrusions (2E, 22E) arefitted, the hole (3F, 23F) being formed with recessed portions 3H at anexit end thereof to which the bosses 2I at the leading ends of the twoprotrusions (2E, 22E) are fitted respectively, the slider for fastenerhaving a structure in which the two protrusions (2E, 22E) on the firstslider member (2, 22) extend out of the hole (3F, 23F) in the secondslider member (3, 23) when the first slider member (2, 22) and secondslider member (3, 23) are fitted to each other.

A third aspect of the present invention is directed to a slider forfastener including: a first slider member (22) formed with a projection(2A, 22A) for disengaging a male engageable member from a femaleengageable member in an engaged state in a packaging bag, the engageablemembers together forming a fastener (F) which is an opening of thepackaging bag, the male engageable member formed by a projected streakportion on one inner side of an end portion of the packaging bag, thefemale engageable member formed by an engagement groove on the otherinner surface of the end portion opposed to the one inner surface, andthe projected streak portion fitted engageably and disengageably intothe engagement groove; and a second slider member (23) formed with anarrowed portion (23C) for engaging the male and female engageablemembers with each other, the slider for fastener being formed by fittingthe first slider member (22) and second slider member (23) to eachother, in which the first slider member (22) is provided with theprojection (22A), which is adapted to be inserted forcibly between themale and female engageable members in an engaged state in the fastener(F) from outside the fastener (F) of the packaging bag, and twoprotrusions (22E) extending toward the second engageable member (23) andeach having a boss 2I at a leading end thereof, and in which the secondslider member (23) is formed with the narrowed portion (23C), which isadapted to fit the male and female engageable members in a disengagedstate with each other and hold them, and a hole (23F) into which the twoprotrusions (22E) are fitted, the hole being formed with: recessedportions 3H at an exit end thereof to which the bosses (22I) at theleading ends of the two protrusions (22E) are fitted respectively; andbosses (23L), on the side nearer the first slider member, adapted to beengaged, respectively, with the bosses (22I) at the leading ends of thetwo protrusions (22E) provided on the first slider member (22).

In a fourth aspect of the present invention, inner walls (3D, 23D) oneither side of the narrowed portion (3C, 23C) in the second slidermember (3, 23) are each formed with a recessed portion (3E, 23E) towhich the bulge of the fastener portion of the packaging bag is fitted.

In a fifth aspect of the present invention, the slider for fastener isadapted to be fitted to an after-broken sealed portion, outside theopening of the fastener (F), of the end portion of the packaging bag.

In a sixth aspect of the present invention, the projection (2A, 23A) isformed with another projection (2J, 22J) extending in the slidingdirection with a height smaller than that of the projection (2A, 22A).

In a seventh aspect of the present invention, a constriction (2Q, 22Q)is provided in the vicinity of the leading end of the projection (2A,22A) on the first slider member (2, 22).

Advantages

The slider for fastener according to the present invention adapted to bethe above means can be fitted to a fastener included in a sealedpackaging bag after the vicinity of the fastener is broken by hand orcut with scissors. In this case, the first slider member with theprojection and the second slider member with the narrowed portion may beproduced separately and fitted easily to each other to be a slider liketypical ones.

This slider can open the fastener by easily inserting the first slidermember with the projection forcibly between the fastener in a closedstate. Also, the slider for fastener according to the present inventiononce fitted to the mouth of the packaging bag to open and close thefastener can be disassembled into the first and second slider membersonly by pinching the two protrusions so as to come close to each other,and removed.

The slider for fastener according to the present invention can be in a“semi-fitted state” where the first and second slider members are notseparated. This reduces the possibility of losing one of the slidermembers. That is, as shown in FIGS. 1 and 5, the first slider member 2and the second slider member are fitted to each other to be a typicalslider. However, when the two protrusions 2I:2I are pinched to be pulledoff the hole 3F in the second slider member 3, the bosses 22E,22E on thetwo protrusions 22I are caught by the respective bosses 23L formed onone of the inner walls of the hole (23F) on the side nearer the firstslider member (22) as shown in FIG. 20 (B), which causes the slider tobe in a “semi-fitted state”. The slider members are thus separated whileremaining linked to each other and thereby cannot fall off. Also, inthis “semi-fitted state”, the first slider member 2 can be fitted easilyto the fastener F.

The slider for fastener according to the present invention adapted to bethe above means can be fitted to a fastener included in a sealedpackaging bag after the vicinity of the fastener is broken by hand orcut with scissors. In this case, the first slider member with theprojection and the second slider member with the narrowed portion may beproduced separately and fitted easily to each other to be a slider liketypical ones.

In particular, the slider for fastener according to the presentinvention can be fitted to a fastener included in a sealed packaging bagafter the vicinity of the fastener is broken or cut with scissors, andalso can be easily fitted and removed. Therefore, the slider isapplicable to most of sealed packaging bags with a fastener.Particularly, in accordance with the seventh means, the projected streakportion of the fastener can be fitted to the constriction to be stablydisengaged from the engagement groove into which the projected streakportion is fitted. Then, in accordance with the fourth means, the convexportion formed by the bulge of the fastener of the bag can be fitted tothe recessed groove in the narrowed portion so that the slider is fittedstably.

Moreover, since the slider for fastener according to the presentinvention consists of two separate components to be fitted to eachother, the die for molding the slider for fastener has a simplestructure and can be manufactured at low cost. Further, the first slidermember may be fitted laterally at one end of the fastener, and thesecond slider member may separately be fitted from above to the fastenersuch that the narrowed portion holds the fastener portion, and thenfitted to the first slider member.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall perspective view of a slider 1 for fasteneraccording to the present invention in an assembled state.

FIG. 2 is an exploded perspective view of a first slider member and asecond slider member included in the slider for fastener according tothe present invention in a pre-fitted and -assembled state.

FIG. 3 is an assembled perspective view showing a state where themembers are fitted to each other as shown in FIG. 1 and turned upsidedown.

FIG. 4 is an exploded perspective view showing a state where the firstand second slider members in a pre-assembled state are turned upsidedown.

FIG. 5 (A) is a plan view of the slider 1 for fastener according to thepresent invention in an assembled state, FIG. 5 (B) is a front view, andFIG. 5 (C) is a bottom view.

FIG. 6 (A) is a side view of the first slider member 2 of the slider 1for fastener according to the present invention, viewed in the directionindicated by the arrow P, and FIG. 6 (B) is a side view of the secondslider member 3, viewed in the direction indicated by the arrow Q.

FIG. 7 (A) is a cross-sectional view along the arrows A-A in FIG. 5 (A),and FIG. 7 B) is a cross-sectional view along the arrows B-B in FIG. 5(B).

FIG. 8 (A) is a cross-sectional view along the arrows C-C in FIG. 5 (B),and FIG. 8 (B) is a cross-sectional view along the arrows D-D in FIG. 5(B).

FIG. 9 is a partially enlarged view showing a state where a fastener isplaced and closed inside a narrowed portion in the second slider memberaccording to the present invention.

FIG. 10 is a partially enlarged view showing a state where a projectionon the first slider member according to the present invention isinserted forcibly into a closed fastener.

FIG. 11 is a front view showing a state where a vertically-elongatedslider is fitted to a fastener of a packaging bag.

FIG. 12 (A) is a cross-sectional view along the arrows D-D as similarlyas FIG. 5 (B) in the case where the space between inner walls of thefirst slider member is elongated vertically, and FIG. 12 (B) is across-sectional view in the case where the space over the narrowedportion in the second slider member is elongated.

FIG. 13 is a perspective view of the slider for fastener according tothe present invention as shown in FIG. 1 in process of being fitted to afastener of a packaging bag.

FIG. 14 is a perspective view of the slider for fastener according tothe present invention as shown in FIG. 1 after fitted to the fastener ofthe packaging bag.

FIG. 15 (A) shows a state where the slider fitted to the mouth E of thepackaging bag W reaches one end of the fastener, and FIG. 15 (B) is across-sectional view along the arrows G-G in FIG. 15 (A).

FIG. 16 are perspective views of a slider for fastener according to asecond embodiment of the present invention. FIG. 16 (A) is an overallperspective view of the slider 1 for fastener according to the secondembodiment of the present invention in an assembled state, FIG. 16 (B)is a perspective view showing a semi-fitted state where the first slidermember 2 is pulled a little out of the second slider member, and FIG. 16(C) is a perspective view in a separated state.

FIG. 17 are perspective views of the second embodiment of the presentinvention, viewed in another direction. FIG. 17 (A) is an overallperspective view in an assembled state, FIG. 17 (B) is a perspectiveview showing a semi-fitted state where the first slider member 2 ispulled a little out of the second slider member, and FIG. 17 (C) is aperspective view in a separated state.

FIG. 18 are overall perspective views of the slider for fasteneraccording to the second embodiment of the present invention, turnedupside down. FIG. 16 (A) is an overall perspective view in an assembledstate, FIG. 18 (B) is a perspective view showing a semi-fitted statewhere the first slider member 18 is pulled a little out of the secondslider member, and FIG. 18 (C) is a perspective view in a separatedstate.

FIG. 19 (A) is a front view of the second embodiment of the presentinvention, FIG. 19 (B) is a plan view, FIG. 19 (C) is a bottom view,FIG. 19 (D) is a left side view, and FIG. 19 (E) is a right side view.

FIG. 20 (A) is a cross-sectional view along the arrows A-A in FIG. 19(A), and FIG. 20 (B) is a cross-sectional view along the arrows C-C inFIG. 19 (A).

FIG. 21 (A) is a cross-sectional view along the arrows B-B in FIG. 19(B), showing a state where bosses on two protrusions are caught bybosses of a hole in the second slider member in process of the firstslider member being pulled out of the second slider member 23, and FIG.21 (B) is a cross-sectional view along the arrows A-A in FIG. 21 (A),showing the same state.

FIG. 22 is an overall perspective view showing a state where the sliderfor fastener according to the present invention is fitted to a fastenerof a packaging bag W.

FIG. 23 is a perspective view of the slider for fastener according tothe second embodiment of the present invention, in which a strapattachment is provided in the second slider member.

FIG. 24 is a perspective view showing a state where a strap is fitted toa fastener of a packaging bag such as a fashion bag to the slider forfastener according to the second embodiment of the present invention.

FIG. 25 is an overall perspective view of a conventional packaging bagwith a sealing portion.

FIG. 26 is a perspective view of a conventional separable slider forfastener used in conventional packaging bags with a fastener.

FIG. 27 is a perspective view in a separated state of the conventionalseparable slider for fastener used in conventional packaging bags with afastener.

FIG. 28 shows the structure of a fastener provided in typical packagingbags, FIG. 28 (B) shows a state where a projection of a slider isinserted forcibly into the fastener in a closed state to open thefastener, and FIG. 28 (C) shows a state where the fastener in an openedstate is closed by the narrowed portion of the slider.

FIG. 29 (A) is an overall perspective view of a conventionalsingle-piece slider for fastener, and FIG. 29 (B) is a perspective viewof the slider in half.

FIG. 30 is a perspective view showing a state where a conventionalslider is fitted to a fastener provided at a mouth of a conventionalpackaging bag.

BEST MODE FOR CARRYING OUT THE INVENTION

Concrete embodiments of the present invention will hereinafter bedescribed in detail with reference to the drawings.

FIG. 1 is an overall perspective view of a slider 1 for fasteneraccording to the present invention in an assembled state. FIG. 2 is anexploded perspective view of a first slider member 2 and a second slidermember 3 included in the slider 1 for fastener according to the presentinvention in a pre-fitted and -assembled state. FIG. 3 is an assembledperspective view showing a state where the members are fitted to eachother as shown in FIG. 1 and turned upside down. FIG. 4 is an explodedperspective view showing a state where the first and second slidermembers 2 and 3 shown in FIG. 3 in a pre-fitted and -assembled state areturned upside down. FIG. 5 (A) is a plan view of the slider 1 forfastener according to the present invention in an assembled state, FIG.5 (B) is a front view, and FIG. 5 (C) is a bottom view. FIG. 6 (A) is aside view of the first slider member 2 of the slider 1 for fasteneraccording to the present invention, viewed in the direction indicated bythe arrow P in FIG. 2, and FIG. 6 (B) is a side view of the secondslider member 3, viewed in the direction indicated by the arrow Q inFIG. 2. FIG. 7 (A) is a cross-sectional view along the arrows A-A inFIG. 5 (A), and FIG. 7 (B) is a cross-sectional view along the arrowsB-B in FIG. 5 (B). FIG. 8 (A) is a cross-sectional view along the arrowsC-C in FIG. 5 (B), and FIG. 8 (B) is a cross-sectional view along thearrows D-D in FIG. 5 (B).

As shown in FIGS. 1 to 4, the slider 1 for fastener according to thepresent invention includes a projection 2A adapted to disengage a maleengageable member F1 and a female engageable member F2 in an engagedstate in a fastener (see FIG. 19) and another projection 2J having aheight smaller than that of the projection 2A. The slider 1 alsoincludes a first slider member 2 formed with two protrusions 2E, 2E anda second slider member 3 formed with a narrowed portion 3C for engagingthe male and female engageable members F1 and F2 with each other. Theprojection 2A formed on the first slider member 2 is provided in astanding manner on a bottom portion 2B (see FIGS. 2 and 8 (B)), whilethe two protrusions 2E, 2E are provided in a manner extending toward thesecond slider member 3 and also in a standing manner on a surface 2Cfitting with the second slider member 3. Further, a through hole 3F intowhich the two protrusions 2E, 2E are fitted is provided in the secondslider member 3. The slider 1 has a structure in which the twoprotrusions 2E, 2E provided on the first engageable member 2 extend alittle out of the hole 3F in the second engageable member 3 when thefirst and second slider members 2 and 3 are fitted to each other.

As described above, the second slider member 3 is formed with thenarrowed portion 3C adapted to hold the fastener F from outside. Then,as shown in FIG. 9, grooves 3E, 3E into which the fastener F is to befitted naturally are provided in sidewalls 3D, 3D on either side of thenarrowed portion 3C. A convex portion of the convex bulge formed by themale and female engageable members F1 and F2 is to be fitted to thegrooves 3E, 3E on both sides, whereby the slider 1 for fastener can befitted stably to the fastener F of the packaging bag W.

The leading end 2P of the projection 2A on the first slider member 2 maybe a little rounded to be inserted easily between the engageable portionof the fastener F. A constriction 2Q is then provided in the vicinity ofthe leading end 2P of the projection 2A. As shown in FIG. 10, when theprojection 2A is inserted forcibly between the male and femaleengageable members F1 and F2 of the fastener, the projected streakportion F3 and the engagement groove F4 of the fastener in an disengagedstate are fitted to the constriction 2Q in the vicinity of the leadingend 2P, so that the projected streak portion F3 can be disengaged stablyfrom the engagement groove F4 into which the projected streak portion F3is fitted. The projection 2A on the first slider member 2 is formed withthe projection 2J, which extends continuously in the sliding directionwith a height a little smaller than that of the projection 2A.

The hole 3F provided in the second slider member 3 is provided in aposition where the two protrusions 2E, 2E are just fitted when the firstand second slider members 2 and 3 are fitted to each other. In thiscase, the two protrusions 2E, 2E extend a little out of the hole 3F inthe second engageable member. This is for the reason that the twoprotrusions 2E, 2E in the state shown in FIG. 1 can be pinched withfingers from both sides. Accordingly, the two protrusions 2E, 2E, whenpinched with fingers, deforms elastically to come close to each otherand thereby to be pulled easily off the hole 3F. When the twoprotrusions 2E, 2E thus come close to each other to be pulled easily offthe hole 3F, the slider 1 can also be removed easily from the fastener Fof the packaging bag W and further, advantageously, be changed easily.

As shown in FIGS. 3 and 4, the slider 1 then has a structure in whichstepped portions 2G, 2G are formed in the upper part of inner walls 2H,2H on the opposite side (downside) of the two protrusions 2E, 2E on thefirst slider member 2, while protrusions 3G, 3G to be fitted to thestepped portions 2G, 2G are formed on the second slider member 3(downside) that is provided with the hole 3F into which the twoprotrusions 2E, 2E are fitted. Therefore, the first and second slidermembers 2 and 3 can be fitted firmly to each other through fittingbetween the stepped portions 2G and the protrusions 3G.

Alternatively, the slider 1 may have a structure in which protrusionslike the protrusions 3G are formed on the first slider member 2 that isprovided with the two protrusions 2E, 2E, while stepped portions likethe stepped portions 2G are formed on the second slider member 3 that isprovided with the hole 3F into which the two protrusions 2E, 2E arefitted. That is, the slider 1 may have a structure in which the steppedportions 2G on the first slider member 2 and the protrusions 3G on thesecond slider member 3 are interchanged with each other.

As shown in FIG. 5 (C), the inner walls 2H, 2H of the first slidermember 2 that is provided with the protrusions 2E, 2E are tapered so asto be fitted easily to the mouth E of the packaging bag W in the slidingdirection. Also, as shown in FIG. 7 (B), stepped portions 3H, 3H areformed at an exit on the inner surfaces of the hole 3F in the secondslider member 3, while bosses 2I, 2I to be caught by the steppedportions 3H, 3H are formed on the respective protrusions 2E, 2E on thefirst slider member 2. This fitting allows the first and second slidermembers 2 and 3 not to be separated easily when fitted with each other,that is, to be fitted stably to each other.

It is noted that some sealed packaging bags with a fastener have a longdistance from a broken position to the fastener, as shown in FIG. 11.Vertically-elongated slider members 2 and 3 may be employed in thiscase. That is, the space 2 k between the inner walls 2H and 2H as wellas the projections 2A and 2J of the first slider member 2 may beelongated vertically as shown in FIG. 12 (A), and the space 31 over thenarrowed portion 3C in the second slider member 3 may also be elongatedvertically as shown in FIG. 12 (B). FIG. 11 shows a state where the thusarranged slider 1 is fitted to the packaging bag W.

FIG. 13 is a perspective view of the slider 1 for fastener according tothe present invention in process of being fitted to a fastener Fincluded in a sealed packaging bag W after broken at the end portionthereof, where the first and second slider members 2 and 3 are fittedseparately. FIG. 14 is a perspective view of the slider 1 for fasteneraccording to the present invention after fitted and assembled to thepackaging bag W.

The projections 2A and 2J of the first slider member 2 are firstinserted from above through the mouth E in a closed state of thepackaging bag W in such a manner as to disengage the projected streakportion 3F of the male engageable member F1 from the engagement grooveF4 of the female engageable member F2, both included in the fastener Fof the broken packaging bag W. Next, the narrowed portion 3C in thesecond slider member 3 is fitted at the other end in the slidingdirection to the fastener F at the mouth E of the packaging bag W, andthen the two protrusions 2E, 2E on the first slider member 2 are fittedinto the hole 3F in the second slider member 3. At the same time, theprotrusions 3G, 3G on the second slider member 3 are fitted to thestepped portions 2G, 2G on the first slider member 2. The fastener F isthen fitted to the grooves 3E as shown in FIG. 9. The first and secondslider members 2 and 3 are thus fitted firmly to each other as shown inFIG. 14. Then, the fastener F at the mouth E of the bag W can be openedand closed by moving the slider 1 left and right.

FIG. 15 (A) shows a state where the slider 1 fitted to the mouth E ofthe packaging bag W reaches one end of the fastener F, and FIG. 15 (B)is a cross-sectional view along the arrows G-G in FIG. 15 (A). When theslider 1 for fastener reaches one end of the fastener F, the secondslider member travels outside the end of the packaging bag, but theprojection 2J, which is provided on the first slider member 2 with aheight smaller than and a width greater than those of the projection 2A,hits the end of the mouth E of the packaging bag W and stops there.Similarly, even when the slider 1 for fastener may reach the other endof the packaging bag W, the projection 2A comes into contact with theend of the packaging bag W, whereby the slider 1 for fastener cannotalso fall off. Accordingly, the slider 1 for fastener can be stabilizednot to easily fall off from the mouth E of the packaging bag W. It isnoted that when the first and second slider members 2 and 3 are fittedto each other, the bosses 2I on the respective protrusions 2E are caughtby the recessed portions 3H at the end of the hole 3F in the secondslider member 3 so that the slider members are in a stable assembledstate, as shown in FIG. 15 (B).

On the other hand, when the slider 1 for fastener fitted to the mouth Eof the packaging bag W is removed, they can be separated and removedeasily by pinching the two protrusions 2E, 2E on the first slidermember, which extend a little out of the hole 3F in the second slidermember 3 as shown in FIG. 1, so as to be deformed elastically andthereby made a little narrower than the hole 3F. Thus, when the slider 1is fitted to another packaging bag, the first and second slider members2 and 3 are disassembled and removed from the packaging bag W (the firstslider member 2 is remove upward, while the second slider member 3 isremoved laterally), and then fitted again to a mouth E of anotherpackaging bag W.

A second concrete embodiment of the present invention will hereinafterbe described in detail with reference to the drawings.

FIG. 16 (A) is an overall perspective view of the slider 1 for fasteneraccording to the second embodiment of the present invention in anassembled state, FIG. 16 (B) is a perspective view showing a semi-fittedstate where a first slider member 2 is pulled a little out of a secondslider member, and FIG. 16 (C) is a perspective view in a separatedstate. FIG. 17 are overall perspective views of the second embodiment ofthe present invention, viewed from an angle different from that of FIG.16, where FIG. 17 (A) is an overall perspective view in an assembledstate; FIG. 17 (B) is a perspective view showing a semi-fitted statewhere the first slider member 2 is pulled a little out of the secondslider member; and FIG. 17 (C) is a perspective view in a separatedstate. FIG. 18 show the slider for fastener according to the secondembodiment of the present invention, turned upside down, where FIG. 18(A) is an overall perspective view in an assembled state; FIG. 18 (B) isa perspective view showing a semi-fitted state where the first slidermember 22 is pulled a little out of the second slider member 23; andFIG. 18 (C) is a perspective view in a separated state.

Also in the second embodiment of the present invention, the projection22A of the first slider member 22 is formed in a standing manner on aninner bottom portion 22B. That is, the slider 21 for fastener accordingto the present invention includes the projection 22A, which is adaptedto disengage a male engageable member F1 and a female engageable memberF2, in an engaged state, of a fastener, and another projection 22Jhaving a height smaller than that of the projection 22A. The slider 21also includes the first slider member 22 formed with two protrusions22E, 22E and a second slider member 23 formed with a narrowed portion23C for engaging the male and female engageable members F1 and F2 witheach other. The projection 22A formed on the first slider member 22 isprovided in a standing manner on the bottom portion 22B, while the twoprotrusions 22E, 22E are provided in a manner extending toward thesecond slider member 23 and also in a standing manner on a surface 22Cfitting with the second slider member 23. Further, a through hole 23Finto which the two protrusions 22E, 22E are fitted is provided in thesecond slider member 23. In this case, the thus arranged slider 21 has astructure in which the two protrusions 22E, 22E on the first engageablemember 22 extend a little out of the hole 23F in the second engageablemember 3 when the first and second slider members 22 and 23 are fittedto each other.

Grooves 23E, 23E into which the fastener F is to be fitted naturally areprovided in sidewalls 23D, 23D on either side of the narrowed portion23C formed in the second slider member 23. The convex bulge formed bythe male and female engageable members F1 and F2 is to be fitted to thegrooves 23E, 23E on both sides, whereby the slider 21 can be fittedstably to the fastener F of the packaging bag W (same as in FIG. 9).

The leading end 22P of the projection 22A on the first slider member 22may be a little rounded to be inserted easily between the engageableportion of the fastener F. A constriction 22Q is then provided in thevicinity of the leading end 22P of the projection 22A. When theprojection 22A is inserted forcibly between the male and femaleengageable members F1 and F2 of the fastener, the projected streakportion F3 and the engagement groove F4 of the fastener in an disengagedstate are fitted to the constriction 22Q in the vicinity of the leadingend 22P, so that the projected streak portion F3 can be disengagedstably from the engagement groove F4 into which the projected streakportion F3 is fitted (same as in FIG. 10). The projection 22A on thefirst slider member 22 is formed with the projection 2J, which extendscontinuously in the sliding direction with a height a little smallerthan that of the projection 22A.

The hole 23F provided on the second slider member 23 is provided in aposition where the two protrusions 22E, 22E are just fitted when thefirst and second slider members 22 and 23 are fitted to each other. Inthis case, the two protrusions 22E, 22E extend a little out of the hole23F in the second engageable member 23. This is for the reason that thetwo protrusions 22E, 22E in the fitted state shown in FIG. 23 (A) can bepinched with fingers from both sides. Accordingly, the two protrusions22E, 22E, when pinched with fingers, deforms elastically to come closeto each other and thereby to be pulled easily off the hole 23F (same asin Paragraph [0026]).

Next, FIG. 19 (A) is a front view of the second embodiment of thepresent invention, FIG. 19 (B) is a plan view, FIG. 19 (C) is a bottomview, FIG. 19 (D) is a left side view, and FIG. 19 (E) is a right sideview. FIG. 20 (A) is a cross-sectional view along the arrows A-A in FIG.19 (A), and FIG. 20 (B) is a cross-sectional view along the arrows C-Cin FIG. 19 (A). FIG. 21 (A) is a cross-sectional view along the arrowsB-B in FIG. 19 (B), showing a state where bosses 22I, 22I on the twoprotrusions 22E, 22E are caught by bosses 23L of the hole 23F in thesecond slider member 23 in process of the first slider member 22 beingpulled out of the second slider member 23, and FIG. 21 (B) is across-sectional view along the arrows A-A in FIG. 21 (A), showing thesame state.

As shown in these figures, in accordance with the second embodiment ofthe present invention, the first slider member 22 cannot be pulled offthe hole 23F in the second slider member 23 at one time, even if may betried, because the two protrusions 22E, 22E are caught by the bosses23L, 23L of the hole 23F in the second slider member 23 and thereby thefirst slider member 22 stops there. It is noted that the first slidermember 22 in this state can be pulled off the second slider member 23 bypinching the inner protrusions 22E, 22E so as to be deformedelastically.

FIG. 22 is an overall perspective view showing a state where the slider21 for fastener according to the present invention is fitted to afastener F of a packaging bag W. Next, the slider 21 for fastener can befitted to the packaging bag W by pulling the first slider member 22 outof the second slider member 23 to cause the slider 21 for fastener to bein a semi-fitted state, fitting the first slider member 22 from abovethe fastener F of the packaging bag W at one end of the fastener F, andfitting the second slider member 23 at the other end in the slidingdirection. The protrusions 22E, 22E are then fitted completely into thehole 23F in the second slider member 23 so that the first slider member22 is fitted into the second slider member 23.

FIG. 23 is a perspective view of the slider 21 for fastener according tothe second embodiment of the present invention, in which a strapattachment 24 is provided in the second slider member 23. If a packagingbag is worn out and unusable, the slider (1, 21) for fastener accordingto the present invention can be removed easily from the packaging bagand used in another packaging bag. The slider (1, 21) for fasteneraccording to the present invention may also be attached with a strap soas to advantageously be less likely to be lost.

FIG. 24 is a perspective view showing a state where the slider 21 forfastener according to the second embodiment of the present invention isfitted to a fastener F of a packaging bag such as a fashion bag. Theslider (1, 21) according to the present invention may be fitted to afastener F of a fashion bag. This looks dressed up (pretty) and feelscomfortable to carry around the bag with the slider. Particularly, sincethe slider can be attached with a strap, using mascot animals and goodsmay enhance the sales of fashion bags.

REFERENCE NUMERALS

-   1 Slider-   2 First slider member-   2A Projection of the first slider member-   2B Bottom portion of the first slider member-   2C Wall, in fitting direction, of the first slider member-   2E Protrusion on the first slider member-   2I Boss on the protrusion on the first slider member-   2J Another projection extending continuously in the sliding    direction from the projection of the first slider member-   +−P Bulge portion-   2Q Constriction of the projection-   3 Second slider member-   3C Narrowed portion in the second slider member-   3E Recessed groove-   3F Hole in the second slider member-   3L Boss in the hole of the second slider member

1. A slider for fastener comprising: a first slider member formed with aprojection (2A) for disengaging a male engageable member from a femaleengageable member in an engaged state in a packaging bag, the engageablemembers together forming a fastener (F) which is an opening of thepackaging bag, the male engageable member formed by a projected streakportion on one inner side of an end portion of the packaging bag, thefemale engageable member formed by an engagement groove on the otherinner surface of the end portion opposed to the one inner surface, andthe projected streak portion fitted engageably and disengageably intothe engagement groove; and a second slider member formed with a narrowedportion for engaging the male and female engageable members with eachother, said slider for fastener being formed by fitting said first andsecond slider members to each other, wherein said first slider member isformed with said projection, which is adapted to be inserted forciblybetween the male and female engageable members in an engaged state inthe fastener (F) from outside the fastener (F) of the packaging bag, andtwo protrusions extending toward said second engageable member, andwherein said second slider member is provided with said narrowedportion, which is adapted to fit the male and female engageable membersin a disengaged state with each other and hold them, and a hole intowhich said two protrusions are fitted, said slider for fastener having astructure in which said two protrusions on said first slider memberextend out of said hole (3F) in said second slider member when saidfirst and second slider members are fitted to each other.
 2. A sliderfor fastener comprising: a first slider member formed with a projectionfor disengaging a male engageable member from a female engageable memberin an engaged state in a packaging bag, the engageable members togetherforming a fastener (F) which is an opening of the packaging bag, themale engageable member formed by a projected streak portion on one innerside of an end portion of the packaging bag, the female engageablemember formed by an engagement groove on the other inner surface of theend portion opposed to the one inner surface, and the projected streakportion fitted engageably and disengageably into the engagement groove;and a second slider member formed with a narrowed portion for engagingthe male and female engageable members with each other, said slider forfastener being formed by fitting said first and second slider members toeach other, wherein said first slider member (2) is formed with saidprojection, which is adapted to be inserted forcibly between the maleand female engageable members in an engaged state in the fastener (F)from outside the fastener (F) of the packaging bag, and two protrusionsextending toward said second engageable member and each having a boss ata leading end thereof, and wherein said second slider member is providedwith said narrowed portion, which is adapted to fit the male and femaleengageable members in a disengaged state with each other and hold them,and a hole into which said two protrusions are fitted, said hole beingformed with recessed portions at an exit end thereof to which saidbosses at the leading ends of said two protrusions are fittedrespectively, said slider for fastener having a structure in which saidtwo protrusions on said first slider member extend out of said hole insaid second slider member when said first and second slider members arefitted to each other.
 3. A slider for fastener comprising: a firstslider member formed with a projection for disengaging a male engageablemember from a female engageable member in an engaged state in apackaging bag, the engageable members together forming a fastener (F)which is an opening of the packaging bag, the male engageable memberformed by a projected streak portion on one inner side of an end portionof the packaging bag, the female engageable member formed by anengagement groove on the other inner surface of the end portion opposedto the one inner surface, and the projected streak portion fittedengageably and disengageably into the engagement groove; and a secondslider member formed with a narrowed portion for engaging the male andfemale engageable members with each other, said slider for fastenerbeing formed by fitting said first and second slider members to eachother, wherein said first slider member is provided with saidprojection, which is adapted to be inserted forcibly between the maleand female engageable members in an engaged state in the fastener (F)from outside the fastener (F) of the packaging bag, and two protrusionsextending toward said second engageable member and each having a boss ata leading end thereof, and wherein said second slider member is formedwith said narrowed portion, which is adapted to fit the male and femaleengageable members in a disengaged state with each other and hold them,and a hole into which said two protrusions are fitted, said hole beingformed with: recessed portions at an exit end thereof to which saidbosses 2I at the leading ends of said two protrusions are fittedrespectively; and bosses, on the side nearer said first slider member,adapted to be engaged, respectively, with said bosses at the leadingends of said two protrusions provided on said first slider member. 4.The slider for fastener according to any of claims 1 to 4, wherein innerwalls on either side of said narrowed portion in said second slidermember are each formed with a recessed portion to which the bulge of afastener portion of the packaging bag is fitted.
 5. The slider forfastener according to any of claims 1 to 5, adapted to be fitted to anafter-broken sealed portion, outside the opening of the fastener (F), ofthe end portion of the packaging bag.
 6. The slider for fasteneraccording to any of claims 1 to 6, wherein said projection on said firstslider member is formed with another projection extending in the slidingdirection with a height smaller than that of said projection.
 7. Theslider for fastener according to any of claims 1 to 7, wherein aconstriction is provided in the vicinity of a leading end of saidprojection on said first slider member.